Question

Ajutorrr!!!! Exercitiul 1

Answer 1

a) ipotenuza=√(4²+3²)=√(16+9)=√25=5
sin α =4/5
cos α=3/5
tg α  =4/3
ctg α=3/4

b) cateta=√(13²-5²)=√(169-25)=√144=12
sin α =5/13
cos α=12/13
tg α  =5/12
ctg α=12/13

c) ipotenuza=√(7²-10²)=√(49-100)=√149
sin α =10/√149
cos α=7/√149
tg α  =10/7
ctg α=7/10

d) cateta=√(16²-12²)=√(256-144)=√112=4√7
sin α =4√7/16
cos α=12/16=3/4
tg α  =4√7/12
ctg α=12/4√7